#!/usr/bin/python
# -*- coding: UTF-8 -*-

 # 打印空心等边三角形
'''
rows = int(raw_input('请输入行数： '))
for i in range(0,rows):
    for k in range(0, 2 * rows - 1):
        if (i != rows - 1)and(k == rows - i - 1 or k == rows + i - 1):
             print " * ",
        elif i == rows - 1:
            if k % 2 == 0:
                print " * ",
            else:
                print "   ",
        else:
            print "   ",
    print ("\n")
'''
'''
for i in range(1,11):
    for k in range(1,i):
        print k                #输出数字堆
        k +=1              
    i +=1
    print ("\n")
'''
